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(i) Check the validity of given statemen...

(i) Check the validity of given statement
r : A triangle is iosceles if and only if its two angles are equal
(ii) Using the word " necessary and sufficent " rewrite the statement " A sequnece is in G. P if and only if each term differs from the succeeding one by a non-zero constant ratio

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(i) Component statements are
p : A tringle is isosceles
q : Two angles of a triangle are equal
To check the validity of r, first we asseme that p is true , i.e.,triangle is isosceles then its sides are equal , so it's two angles are also equal . Hence , q is true
Now, assuming that q is true , that two angles of a triangle are equal then their corresponding two sides are also equal so triangle is isosceles . Hence , p is also true
Statement r is valid
(ii) The necessary and sufficent condition for a sequence is in G.P is that each term must be differs from the succeeding one by a non-zero constant ratio
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